Anonymize resume template with configurable environment variables

[Copilot]

This PR converts the resume template to use anonymized fake data and makes all personal information configurable through environment variables, addressing the requirement to anonymize all data and use English throughout.

Changes Made

Environment Variables (.env)

• Replaced all personal data with anonymized fake information for "John Smith"
• Added comprehensive environment variables for:
  • Basic info: RESUME_NAME, RESUME_EMAIL, RESUME_PHONE, etc.
  • Contact details: RESUME_WEBSITE, RESUME_LINKEDIN, RESUME_GITHUB, etc.
  • Social media: RESUME_TWITTER, RESUME_XING, RESUME_STACKOVERFLOW
  • Companies: RESUME_COMPANY_1 through RESUME_COMPANY_4
  • University: RESUME_UNIVERSITY, RESUME_UNIVERSITY_URL
  • Projects: RESUME_PROJECT_*_NAME, RESUME_PROJECT_*_URL, RESUME_PROJECT_*_REPO

Content Files

All content files now use REPLACE_* placeholders instead of hardcoded personal data:

• 0-introduction.md: Company and contact information replaced with variables
• 1-curriculum-vitae.md: Education, work experience, and references anonymized
• 2-portfolio.md: Project examples converted to use configurable variables
• 3-contact.md: All contact information uses environment variables

Script Improvements

• Scripts/replace.sh: Extended to handle all new environment variables and fixed CI environment detection
• Scripts/filter.sh: Removed German content ("Lebenslauf") and hardcoded names
• Scripts/build.sh: Fixed environment variable loading with proper .env sourcing
• Scripts/functions.sh: Updated CI variable handling for consistency

Language Conversion

• Converted all remaining German content to English
• Updated project descriptions and references to use English terminology
• Maintained professional tone while using generic, anonymized examples

Example Output

After processing, placeholders like REPLACE_EMAIL become real values:

- [Email](mailto:john.smith@example.com)
- [Phone](tel:+1-555-123-4567)
- [Website](https://johnsmith.example.com)

The template now generates professional-looking resumes with completely anonymized data while remaining fully configurable for different users through the .env file.

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